Re: __ipairs (was: Re: Lua 5.4 Tuples FTW!)

[Hisham <h@...>]

On 16 March 2018 at 07:56, John Hind <john.hind@zen.co.uk> wrote:
>>
>> >>>> for i,v in pairs(t) do print(i,v) end
>>
>> >>A perfect example of why deprecating __ipairs was the wrong move. It
>> >>ought to be possible to make this code work with ipairs(t) as well, but
>> >>with no __ipairs metamethod it can't be done.
>>
>> >>Andrew.
>
> Except of course by the simple expedient of replacing ipairs(t) with a
> version
> that does what you want it to do directly! Even, if you insist, with a
> version that
> uses a metamethod __ipairs! The metamethods on both pairs and ipairs have
> always baffled me with their utter triviality!

When writing a library, you cannot assume you can monkey-patch other
people's standard libraries at will.

Not everyone writes Lua code in a situation where they can play God
with the environment.

-- Hisham